Review Detail of painful_sin in Naruto System in One Piece

the story at the beginning was great. the wuxia cliche, becoming a marine, his rank, harem like MC is all ok for me. I've read worse, but as I continue I feel like a kid playing a lego toy, all mess-up you know, the timeline, the strength, his skill, his dense around girls, he was suppose to be one piece fan but feels like he didn't have anyone he love to meet or interested in. all mess up everything. its kind of disappointing